High-strength wear-resistant multi-cone bit

Abstract

The utility model relates to the technical field of roller bits, and discloses a high-strength wear-resistant multi-roller bit which comprises a bit set, a roller set is arranged on the bit set, a nozzle is arranged in one end, facing the roller set, of the bit set, a slurry supply port is formed in one end, located in the bit set, of the nozzle, a sliding groove is formed in the inner wall of the nozzle, and the sliding groove is communicated with the nozzle. A spray pipe is arranged in the nozzle, sliding blocks are installed on the two sides of the lower end of the spray pipe, a baffle plate is installed at the end, protruding out of the nozzle, of the spray pipe, a slurry inlet is formed in the end, close to the slurry supply port, of the spray pipe, and a spring is connected to the peripheral side of the slurry inlet. When slurry is fed into the spray pipe from the slurry supply port, the spray pipe is pushed out of the nozzle through the impact force of the slurry under the blocking of the blocking plate, and the pressure of the slurry is unstable, so that the spray pipe can be vibrated in cooperation with the spring, and disintegrating slag is blocked under a certain condition; and the cone group can be directly washed and cooled according to the angle of the spray hole.

Description

Technical Field

[0001] This utility model relates to the field of roller cone drill bit technology, specifically a high-strength wear-resistant multi-cone drill bit. Background Technology

[0002] Roller cone bits are the most widely used type of drilling bit. When working, the cutting teeth of a roller cone bit alternately contact the bottom of the well, resulting in low rock-breaking torque, small contact area between the cutting teeth and the bottom of the well, high specific pressure, easy penetration into the formation, and a large total working length, thus relatively reducing wear. Roller cone bits can adapt to a variety of formations from soft to hard.

[0003] During the operation of a roller cone drill bit, slurry needs to be sprayed through nozzles to cool the drill bit and reduce wear. However, traditional mud nozzles are mostly designed to be perpendicular to the roller cone. This means that the slurry sprayed from the nozzles falls onto the cuttings produced by the drill bit, rather than directly onto the roller cone itself. When these cuttings are mixed with mud, they tend to adhere to the roller cone during continuous operation, leading to increased wear on the meshing roller cones. Furthermore, cuttings can clog the nozzles, reducing slurry flow and hindering timely cooling of the roller cones, further exacerbating wear. Therefore, those skilled in the art have developed a high-strength, wear-resistant multi-cone drill bit to address the problems mentioned in the background section. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] To address the shortcomings of existing technologies, this invention provides a high-strength, wear-resistant multi-cone drill bit. This solves the problem that traditional mud nozzles are mostly set perpendicular to the cones, resulting in the slurry being sprayed onto the drill bits' debris rather than directly onto the cones. Furthermore, the drill bits' debris, after being mixed with mud, easily adheres to the cones during continuous operation, leading to increased wear on the meshing cones. Additionally, the debris can clog the nozzles, reducing slurry flow and causing insufficient cooling of the cones, further exacerbating wear.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, this utility model provides the following technical solution: a high-strength, wear-resistant multi-cone drill bit, comprising a drill bit assembly, wherein a cone set is provided on the drill bit assembly, a nozzle is provided at one end of the drill bit assembly facing the cone set, a slurry supply port is provided at one end of the nozzle inside the drill bit assembly, a sliding groove is provided on the inner wall of the nozzle, a spray pipe is provided inside the nozzle, sliders are installed on both sides of the lower end of the spray pipe, a baffle plate is installed at the end of the spray pipe protruding from the nozzle, a slurry inlet is provided at one end of the spray pipe near the slurry supply port, a spring is connected to the periphery of the slurry inlet, the end of the spring away from the slurry inlet is connected to the end wall of the slurry supply port, and a spray hole is provided on the spray pipe.

[0008] Preferably, the spring is a tension return spring.

[0009] Preferably, the nozzle is slidably inserted into the spray pipe and the slider is slidably engaged with the chute. Since a spring is connected to the periphery of the slurry inlet, the end of the spring away from the slurry inlet is connected to the end wall of the slurry supply port. When the pressure of the slurry is unstable and debris splashes onto the baffle plate, the spring can vibrate the spray pipe, thereby blocking and cleaning the debris under certain conditions.

[0010] Preferably, the nozzle is opened towards the side of the gear assembly. When the slurry is sprayed out from the nozzle, the gear assembly can be directly rinsed and cooled according to the angle of the nozzle, avoiding the problem of debris and mud adhering to the gear and causing accelerated wear of the gear.

[0011] (III) Beneficial Effects

[0012] Compared with the prior art, this utility model provides a high-strength, wear-resistant multi-cone drill bit, which has the following beneficial effects:

[0013] Through design, the multi-cone drill bit in this utility model consists of a drill bit assembly and a cone assembly. The drill bit assembly is equipped with a nozzle, and a nozzle tube is slidably inserted into the nozzle. Spray holes are opened on the outer wall of the nozzle tube, and the spray holes are respectively opened towards the cone tube opposite and the cone tubes on both sides. Under the action of the baffle plate, when the slurry is fed into the nozzle tube through the slurry supply port, the slurry is blocked by the baffle plate and the impact force of the slurry pushes the nozzle tube out of the nozzle. Since the pressure of the slurry is not stable, the spring can make the nozzle tube vibrate, thereby blocking the debris to a certain extent. When the slurry is sprayed out from the spray hole, it can directly flush and cool the cone assembly according to the angle of the spray hole, avoiding the problem of debris and mud adhering to the cone tube, which would lead to accelerated wear of the cone tube. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural schematic diagram of a high-strength, wear-resistant multi-cone drill bit provided in an embodiment of this application.

[0015] Figure 2 This is a schematic diagram of the nozzle structure in a high-strength, wear-resistant multi-cone drill bit provided in an embodiment of this application.

[0016] Figure 3 This is a partial cross-sectional view of the nozzle in a high-strength, wear-resistant multi-cone drill bit provided in an embodiment of this application.

[0017] Figure 4 This is a schematic diagram of the slurry inlet structure of a high-strength, wear-resistant multi-cone drill bit provided in an embodiment of this application.

[0018] In the diagram: 1. Drill bit assembly; 2. Roller cone assembly; 3. Nozzle; 4. Grout inlet; 5. Slide groove; 6. Spray pipe; 7. Spray hole; 8. Baffle plate; 9. Grout inlet; 10. Spring; 11. Slider. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] This utility model provides a technical solution: a high-strength, wear-resistant multi-cone drill bit. (Please refer to...) Figure 1 , Figure 2 , Figure 3 The system includes a drill bit assembly 1, on which a roller cone assembly 2 is mounted. A nozzle 3 is provided at one end of the drill bit assembly 1 facing the roller cone assembly 2. A slurry supply port 4 is provided at one end of the nozzle 3 inside the drill bit assembly 1. A sliding groove 5 is provided on the inner wall of the nozzle 3. A spray pipe 6 is provided inside the nozzle 3. Slider blocks 11 are installed on both sides of the lower end of the spray pipe 6. A baffle plate 8 is installed at the end of the spray pipe 6 protruding from the nozzle 3. A slurry inlet 9 is provided at one end of the spray pipe 6 near the slurry supply port 4. A spring 10 is connected to the periphery of the slurry inlet 9. The spring 10 is a tension return spring. The end of the spring 10 away from the slurry inlet 9 is connected to the end wall of the slurry supply port 4. A spray hole 7 is provided on the spray pipe 6.

[0021] Please see Figure 1 , Figure 2 , Figure 3 The nozzle 6 is slidably inserted into the nozzle 3, and the slider 11 is slidably engaged with the groove 5. Since a spring 10 is connected to the periphery of the slurry inlet 9, and the end of the spring 10 away from the slurry inlet 9 is connected to the end wall of the slurry supply port 4, and the pressure of the slurry is not stable and when debris splashes onto the baffle plate 8, the spring 10 can vibrate the nozzle 6, thereby blocking and cleaning the debris under certain conditions. The nozzle 7 is opened towards the side of the roller cone assembly 2. When the slurry is sprayed out from the nozzle 7, the roller cone assembly 2 can be directly flushed and cooled according to the angle of the nozzle 7, avoiding the problem of debris mixed with mud adhering to the roller cone, which would lead to increased wear of the roller cone.

[0022] The multi-cone drill bit in this utility model consists of a drill bit assembly 1 and a cone assembly 2. The drill bit assembly 1 is made of high-strength alloy steel, and the cone assembly 2 is made of carbide teeth or diamond composite teeth.

[0023] A nozzle 3 is provided on the drill bit assembly 1, and a slurry supply port 4 is connected to the bottom end of the nozzle 3. A groove 5 is provided on the inner wall of the nozzle 3. A nozzle pipe 6 is slidably inserted into the nozzle 3, and a baffle plate 8 is installed at the end of the nozzle pipe 6 that protrudes from the nozzle 3. A slurry inlet 9 is provided at the end of the nozzle pipe 6 that is adjacent to the slurry supply port 4. A spring 10 is connected to the periphery of the slurry inlet 9. The spring 10 is a tension spring. The end of the spring 10 that is away from the slurry inlet 9 is fixedly connected to the step at the port of the slurry supply port 4. A slider 11 is installed on both sides of the nozzle pipe 6. The nozzle pipe 6 is slidably engaged with the groove 5 on the inner wall of the nozzle 3 through the slider 11, thereby limiting the nozzle pipe 6 and preventing rotation.

[0024] Spray holes 7 are provided on the outer wall of the nozzle 6, and the spray holes 7 are respectively opened towards the opposite roller and the rollers on both sides. Under the action of the baffle plate 8, when the slurry is fed into the nozzle 6 through the slurry supply port 4, the slurry is blocked by the baffle plate 8 and the impact force of the slurry pushes the nozzle 6 out of the nozzle 3. Since the pressure of the slurry is not stable and the debris splashes on the baffle plate 8, the spring 10 can cause the nozzle 6 to vibrate, thereby blocking and cleaning the debris under certain conditions. When the slurry is sprayed out from the spray hole 7, the roller assembly 2 can be directly flushed and cooled according to the angle of the spray hole 7, avoiding the problem of debris mixed with mud adhering to the roller and causing the roller to wear more.

[0025] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0026] In this document, unless otherwise expressly specified and limited, the terms "installation," "setting," "connection," "fixing," "screw connection," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise expressly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0027] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A high-strength, anti-wear, multi-roller bit comprising a bit assembly (1), characterized in that: The drill bit group (1) is provided with a roller group (2), a nozzle (3) is opened in one end of the drill bit group (1) towards the roller group (2), a slurry supply port (4) is opened in one end of the nozzle (3) inside the drill bit group (1), a chute (5) is opened on the inner wall of the nozzle (3), a spray pipe (6) is arranged in the nozzle (3), slide blocks (11) are mounted on both sides of the lower end of the spray pipe (6), a blocking plate (8) is mounted on the end of the spray pipe (6) protruding from the nozzle (3), a slurry inlet port (9) is opened in one end of the spray pipe (6) adjacent to the slurry supply port (4), the slurry inlet port (9) is connected with a spring (10), and a spray hole (7) is opened on the spray pipe (6).

2. The high strength, anti-wear, multi-roller bit of claim 1, wherein: The spring (10) is a tensile reset spring.

3. The high strength, anti-wear, multi-roller bit of claim 1, wherein: One end of the spring (10) away from the slurry inlet port (9) is connected with the end wall of the slurry supply port (4).

4. The high strength, anti-wear, multi-roller bit of claim 1, wherein: The spray pipe (6) and the nozzle (3) are slidingly inserted.

5. The high strength, anti-wear, multi-roller bit of claim 1, wherein: The slide blocks (11) and the chute (5) are slidingly connected.

6. The high strength, anti-wear, multi-roller bit of claim 1, wherein: The spray hole (7) is opened on the side face towards the roller group (2).

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